The children have hours of fun playing with their bricks.孩子们一连数小时都在玩积木，玩得不亦乐乎。I'm up to my eyeballs in reports.我正在写报告，忙得不亦乐乎。I've been very busy recently. Take last week, I had meetings every night after work, except Friday.我最近忙得不亦乐乎。就拿上星期来说，除了星期五，我每天晚上下班以后都要开会。